I am running Ubuntu with xfce on a GeForce 6100-based motherboard. I have the nVidia drivers installed.

I'm using the computer as a video player, particularly for DVDs. I have noticed that the picture quality sucks. The contrast and color are awful. The contrast and color adjustments in xine and mplayer don't actually do anything. I can find no way to actually tweak the picture quality.

I've read some about Xvmc, but I'm not quite sure how to install/enable that, or if I even do.

Anyway, I guess I'm looking for help. I'm displaying this on a 50" plasma using the VGA connection at the plasma's native resolution of 1366x768. If I have to upgrade to another video card to get better picture quality, that's fine.

Also, I'm putting this smiley into this post because it's just awesome:

Which driver are you using? Is it the build in Ubuntu 8xxx driver? The nvidia-settings utility with 9xxx driver allows you to tweak things like sharpness, etc. You may want to post your xorg.conf file to get some pointers.